P08.21 is the authoritative medical code for Post-term newborn. This classification is used in medical billing and clinical recording to specify the clinical criteria for post-term newborn (ICD-10-CM P08.21), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Post-term newborn is a billable ICD-10-CM diagnosis code P08.21. Includes: the listed conditions, without further specification, as causes of morbidity or additional care, in newborn. Inclusion terms: Newborn with gestation period over 40 completed weeks to 42 completed weeks.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for P08.21 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- the listed conditions, without further specification, as causes of morbidity or additional care, in newborn
Inclusion Terms
Alternative terms the tabular list files under this code.
- Newborn with gestation period over 40 completed weeks to 42 completed weeks
Frequently Asked Questions (FAQ) & Clinical Guidance
What conditions are included under P08.21?
Post-term newborn includes: Newborn with gestation period over 40 completed weeks to 42 completed weeks.
Codes in This Family (5)
Official ICD-10-CM classifications in the same code family as P08.21, with their registry titles.
- P08 — Disorders of newborn related to long gestation and high birth weight
- P08.0 — Exceptionally large newborn baby
- P08.1 — Other heavy for gestational age newborn
- P08.2 — Late newborn, not heavy for gestational age
- P08.22 — Prolonged gestation of newborn
Indexed Clinical Terms (2)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Newborn (infant) (liveborn) (singleton), post-term
- Post-term (40-42 weeks) (pregnancy) (mother), infant
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code P07.21
Extreme immaturity of newborn, gestational age less than 23 completed weeks